Can't change grid line in key editor anymore

[sky19880611]

I accidentally made some change in key editor, and now the quantize option become gray, and I can’t change the number of grid line anymore.
The screenshot is in the attachment, please help.
Thanks.

[KHS]

You have changed your grid from Bars+Beats to time, change it back to bars+beats and you should be good to go.

[Lifac]

don’t you read the part where he says it’s gray and he can’t change it? gees…
Same thing happens to me… for days, and I can’t correct it.

[Voex0]

I’ve just had the same problem after resetting preferences. KHS’s solution worked.